Product Description:

The PSI63C0.633-L1 is a medium-frequency drive module manufactured by Bosch Rexroth Indramat within the PSI Frequency Inverters series. As a frequency inverter, it converts fixed utility power into regulated medium-frequency output for induction heating, hardening, or other industrial processes that need controlled energy delivery. In automation cabinets, it functions as the power section while external controllers set operating current or voltage. This arrangement separates the power conversion stage from higher-level process control.

This inverter accepts a three-phase mains input of 400 – 480 VAC, and a switching bridge runs at a clock frequency of 1 kHz to synthesize the desired output waveform. The internal electronics are energized by a separate 24 V DC control supply that keeps logic active during power-stage shutdowns. Thermal dissipation inside the enclosure starts with a basic cabinet loss of 69 W at standby and can increase to 170 W when the unit is delivering rated power. These losses are removed by air cooling, so filtered airflow through the IP20 housing must be maintained. Installation terminals accept conductors up to 50 mm², while signal wiring up to 35 mm² connects auxiliary circuits. Timing and diagnostics are handled through the DeviceNet timer type, allowing networked coordination with supervisory PLCs.

During operation, the power stage can sustain a maximum output current of 800 A, with a nominal system current of 110 A for continuous duty and a short-duration secondary current limit of 36 kA for transformer-coupled loads. Airflow must keep cooling-air temperature below 45 °C, and total cooling loss may reach 360 W; the surrounding ambient is allowed up to 55 °C without derating. A mass of 20 kg helps support panel mounting and reduces center-of-gravity stress when the cabinet door carries the unit.